Improved error responses with request call stacktraces and timestamps
Improved error responses with request call stacktraces and timestamps

Change-Id: Ia240917dc235be238f8f633a99f1a33ad9503fe7

TribeMedia/kurento-client-js,TribeMedia/kurento-client-js,Kurento/kurento-client-js,shelsonjava/kurento-client-js,Kurento/kurento-client-js,shelsonjava/kurento-client-js,Kurento/kurento-client-js